Lake Humphreys
General data
- Name: Lake Humphreys
- Water system: Atchafalaya River
- Water type: Artificial lake
- Progression: Wildhorse Creek (Washita River tributary) -> Washita River -> Lake Texoma -> Red River of the South -> Atchafalaya River -> Gulf of Mexico -> Atlantic Ocean -> Planet Earth
- Climates: Subtropical
- Continents: North America
- Countries: United States of America
Lake Humphreys is a reservoir located northeast of the city of Duncan, Oklahoma, United States. It was created in 1958 with an earthen dam. Its normal capacity is 17,319,000 m3 of water with an average depth of 12 m. The lake covers 3.57 km2 encompassed by 25.9 km of shoreline.